The outputs of all DACs can be updated simultaneously using the LDAC function, with the added functionality of userselectable DAC channels to simultaneously update. There is also an asynchronous CLR that updates all DACs to a userprogrammable code--zero scale, midscale, or full scale. The AD5628/AD5648/AD5668 utilize a versatile 3-wire serial interface that operates at clock rates of up to 50 MHz and is compatible with standard SPI, QSPITM, MICROWIRETM, and DSP interface standards. The on-chip precision output amplifier enables rail-to-rail output swing.